Metalliferous dyestuffs and process for the manufacture of same



Patented Dec. 8, 1931 rr STATES PATENT OFFICE FRITZ STRAUIB AND HANS MAYER, OF BASEL, AND WALTER H ANHART, OF RIEHEN, NEAR BASE-L, SWITZERLAND, ASSIGNORS TOTHE FI RM' SOCIETY OFVCHEMIGAL INDUSTRY IN BASLE, 0F BASEL, SWITZERLAND MET'ALLIFEROUS nyns'rnrns AND PROCESS non THE, MANUFACTURE or slum n0 Drawing. Application filed June 5, 1930,;Serial No. 459,412, and in Switzerland June a, 1929.

The present invention relates to the manufacture oi metalliferous dyestufis. It comprises the process of making these dyestuffs, the dyestuffs themselves, and the material dyed with the new dyestufi's.

By the present invention valuable azo-dyestuffs containing metals are quite generally obtained by treating azo-dyestufi's, deriving from aromatic diam-compounds and coupling components, which are derivatives of the naphthalene series containing nitrogen and which axe-dyestuffs contain lake forming groups, with agents yielding metals capable of forming lakes with the lake-forming group oi'the azo-dyestuflts.

The trcatn'ient of the dyestuifs with agents yielding metal may occur in an aqueous medium; in many cases, however, it is advantageous to carry it out in the presence of organic bases. As such are particularly suitable pyridine, its homologues and hydrogenation products, further also other Water soluble or insoluble bases, such as quinoline, aniline, toluidine, benzylamine, amylamine,

)ropylamine, ethanolamine, or the like,

The process of the invention proceeds easily and. is suitable for'sulfonated and nonsulfonated monoand poly-azo-dyestufis, which contain at least one hydroxyl-group or carboxyhgroup in ortho-position to the =l l-group, or contain a carboxyl-group in ortho-position to a hydroxyl-group.-

The process is particularly applicable for making metal compounds of non-sulfonated ortho-hydroxv or ortho-carboxy-azo-dyestuffs which are derived from (1- and ,8-

naphthylamine or their derivatives used as coupling components.

The complex metal compounds which can be made by the invention, can be used for dyeing materials of any kind, such as wool,

loaded or unloaded silk, cotton, leather, artificial sill-I made from regenerated cellul as, cellulose esters or ethers, varnishes le from cellulose, or natural or artificial ns; they may also be used as pigments.

agents which yield metal, there come into question compounds of metals, adapted to produce metallic complexes with the lakeample those having'atomic weights between 27 and 66, such as,'for example Al, Cu, Zn,

V, Cr, Mn, Fe, Co, Ni.

The treatment with the agent yielding metal may be conducted in presence of suitable additions,with or without application of pressure; also the manufacture of a dyestuff, such as the coupling operation, may be conducted in presence of an agent yielding.

evaporation residue with warm or hot water,

whereby in many cases it is favorable to add to the water small quantities of alkali, in-

organic or organic acid. Impurities which might be present can be removed by treatment with solventsin which the metallized ,dyestufi's are insoluble, such as, for instance,

aqueous-alcohol, If themetalliferous dyestuff is soluble in water, usual methods of isolation may be adopted. I c i I The following examples illustrate the invention, the parts being by weight Emample 1 6.16'parts of the dyestufl of theffoimula I N=N EIN NO 2 V heated to boiling v"for 20-hours in a reflux'apforming group of the azo dyestufi', for ex paratus. The deep green pyridine solution is the solution yieldsbluevioletsolution and in organic solvents, such as alcohol, amylacetate or theliketov a green solution. A solutlon of it in commercial nitrocellulose varnish yields on metal surfaces a yellowish green coating.

Eaampl 2 v 5.26 parts of the dyestuif of the formula obtainable from diazotized Q-amino-l-phenol and ,G-naphthylamine are dissolved in 250 parts of pyridine, and, after addition of 9 parts of chromium acetate, the whole is heated to boiling for 20 hours in a reflux appa ratus. The blue green solution is filtered and the chromium compound is isolated by addition of water to the filtrate and filtered. It is washed and 'dried ata moderate temperature. It is a green-black powder,'insoluble in water, only very sparingly soluble in caustic soda solution to a blue solution and soluble in concentrated sulfuric acid to a red violet solution. In organic solvents, such as alcohol, ethyl acetate, amyl acetate, or the like it dissolves to a blue green solution; so

also in nitrocellulose varnish it dissolves and blue green coatings on metal surfaces. Y

If chromium formate be substituted for chromium acetate a similar product is obobtainable from dia'zotized 4-chloro-2-aminol-phenol and ,B-nap'hthylamine'are dissolved in 250 parts of chinoline, andafter addition of 8 parts of chromium formats, the whole is heated to'boiling'for some hours in a reflux apparatus.w As ,soon as the; chroming ,is at Excess of the chromium salt or other an end, the deep bluish green solution is filtered from undissolved matter and the ehinoline is distilled from it in a vacuum; the chromium compound which remains in the retort is dried at a moderate temperature. It is a green black powder insoluble or very sparingly soluble in water or caustic soda solution and soluble in concentrated sulfuric acid to a violet solution. Its blue green solution in nitrocellulose varnish yields blue green coatings on a metal surface.

For chromium formate chromium acetate maybe substituted. r

Instead of the dyestuff named above there maybe used 'that'from 4 6-dichloro-2-aminol-phenol and B-naphthylamine, the operation being similar to that described; there is obtamed a similar chromium compound which disso ves somewhat more sparingly in nitrocellulose varnish the solution givlng bluishgreen coatings.

Example 4 6.16 parts of the dyestuff of the formula faces olive green coatings.

7 Example 5 3.42 parts of the dyestuff of the formula obtainable from diazotized 5-nitro-4-chloro- 2-amino1-pl1enol and fi-naphthylamine are dissolved in 100 parts of pyridine and the solution is heated to boiling for several hours ina reflux apparatus with a quantity of chromiumformate corresponding with 1.14; parts of Cr O-i. The deep blue-green solution is nlterod from some chromium mud and the dyestuif isolated from the filtrate by distilling the solvent in a vacuum or in some other 'manner, such as by dilution with water, liltering and drying. The dry dyestutl is a black powder, insoluble in water, very sparingly soluble in caustic soda solution andsoluble in concentrated sulfuric acid to a blue solution. In organic solvents it dissolves to a bluish 'reen solution and nitro-cellulose varnishes or acetyl-cellulose varnishes in which it has been dissolved yield on metal surfaces bluish green coatings.

Example 6 3.53 parts of the dyestuff of the formula obtainable from diazotized picramic acid and B-naphthylamine, a quantity of chromium formats corresponding with 1.14 parts of (11 0 and 100 parts of pyridine are heated together to boiling in a reflux apparatus for several hours. hen the chroming is com plete, the undissolved matter is filtered, the pyridine is distilled in a vacuum and the residue is dried, whereby it becomes. a green black powder, very sparingly soluble in water or caustic soda solution but soluble in concentrated sulfuric acid to a violet solution. Its yellow green solutions in acetylcellulose varnish give olive green coatings on metal surfaces.

Emample 7 3.42- parts of the dyestuff of the formula SOzNH:

to a violet solution. .It dyes acetyl-cellulose varnish bluish green.

The same process applied to the dyestutf fromdiazotized anthranilic acid and ,8naphthylamine produces a chromium compound which dyes nitrocellulose varnishes or acetylcellulose varnishes red violet, While it the v chromium compound of the combination para-aminosalicylic acid B-naphthylamine yields a brownish yellowlake which is sparingly soluble in nitrocellulose varnish but still easily soluble in acetyl-cellulose varnish.

, Ewample 8 p 3.24 parts ofthe dyestuif of the formula on e obtainable from diazotized 4-nitro-2-aminol-phenol and 2:5-aminonaphthol combined in mineral acid solution, are dissoved'in parts of pyridine and the solution is heated to boiling for several hours in a reflux apparatus with a quantity of chromium formats solvents it dissolves to a green solution and its solution in nitro-cellulose varnish or acetyl-cellulose varnish yields yellowish green coatings on metal surfaces. The combination 4-nitro-2-amino-l-phe nol+2:T-aminonaphthol (acid coupled) yields a chromium lake which is somewhat more bluish, that from 4-nitro-2-amino-1 phenol and 2 S-aminonaphthol, one which is a more olive tint. The latter is only slightly soluble in nitrocellulose varnish but more so in acetyl-cellulose varnish.

Example 9 3.24 parts of the dyestufi of the formula obtainable from diazotized 5,-nitro-2-aminol-phenol and 2:7-amino-naphthol (acid coupled) are converted inpyridine solution to the chromium compound by means of chroinium formate and the product is isolated as described in one of the foregoing examples. l'Vhen' dry the new'product is a blue-black powder, very sparingly soluble in water but soluble in caustic soda solution to a blue solution, which passes towards green when acidified, and in concentrated sulfuric acid to a blue solution. Its green solution in nitrocellulose varnish or acetyl-cellulose varnish yields green coatings on a metal surface. j

The chromium compound of the combina- ISO tion 5 nitro -2-amino-1-phenol 2 5-aminonaphthol (acid coupled) yields a yellowish green, that with 2: S-aminonaphthol a blackish green. The last-named product is soluble in acetyl-cellulose varnish but not in nitro- E sample 6.48 parts of the dyestuil of the formula obtainable from diazot-ized 5-nitro-2-amino- 1-phenol and 2 'l-amiuonaphthol (alkaline coupled) are dissolved in 250 parts of pyridine and the solution is l ated to boiling for several hours in'a refli apparatus witii 6 parts of chromium formate containing 39 per cent. of Cr Q The initially red solution gradually becomes deep blue. flien the chroming is complete the chromium mud is filtered and the pyridine distilled in a vacuum. The dry residue from the distillation constituting the chromium compound is a dark blue powder, very sparingly soluble in water or caustic soda solution but soluble in concentrated sulfuric acid to a red violet solution. It dissolves in organic solvents to a blue solution and its solution in nitro-cellulose varnish or acetyl-cellulose varnish yields reddish blue coatings on metal surfaces.

From the combination l-chloroQ-amino-lphenol+2z'l-aminonaphthol (alkaline coupled) a violet dyeing chromium compound is obtainel by the same method.

E mample 11 6.27 parts of the dyestuff of the formula aminonaphthol with ortho-aminophenol, l-

chloro2-amino-1-phenol or -nitro-Q-aminol-phenol.

E wample 12 6.42 parts of the dyestufl of the formula in tor or caustic soda solution only very spa! ly. in alcohol to a blue solution and 111 con ited sulfuric acid to a violet solution. The coatings obtained on metal surfaces by means of its solution in nitro-cellulose varnish or acetyl-cellulose varnish are reddish blue.

If instead of ortho-aminophenol other diazo-coinponents, such as 4-chloro-2-aminol-phenol, -nitro-2-amino-1-phenol or 5-nit1'o- Q-amino-l-phenOl are used with the same component, there are obtained simreenish blue to greyish green blue dyecnromium compounds.

By the same method there is obtained from .1 acid coupled dyestuff from diazotized anthranilic acid and 2:7-aminonaphthol a chromium compound, the solution of which in intro-cellulose or acetyl-cellulose varnish yields brown red coatings.

E wample 15 6.16 parts of the dyestuif of the formula obtainable from diazotized 5-nitro-2-amino- 1-pli enol and B-naphthylamine are dissolved in 200 parts ofpyridine and the solution is heated for some timeto boiling with a quantity offerric acetate corresponding with 1.12

parts of iron. The initially red solution rapidly becomes brownish violet. Some iron mud is filtered and from the filtrate the iron compound produced is precipitated by addition of water or the pyridine is distilled in a vacuum and the residue dried at a moderate temperature. lf the pyridine solution is allowed to remain for some time in the cold portion of the dyestui'i' crystallizes. The dark olive iron compound dissolves in water or caustic soda solution very sparingly but I 5 ii a nish or acetyl-cellulose varnish yield coatings of the same tint.

Example 14 5.95 parts of the dyestufi' of the formula obtainable from diazotized 4 -chloro-2-amino-l-phenol and B-naphthylamine are dissolved in 200 parts of pyridine and the solution is heated for some time to boiling with 5 parts of cobalt acetate. The reddish blue solution is filtered and the filtrate is evaporated in a vacuum to dryness. The cobalt compound remains in the form of a blue black powder which does not dissolve in water or caustic soda solution, but in concentrated sulfuric acid dissolves to a violet solution. It is well soluble in organic solvents and its solutions in nitro-cellulose varnish or acetyl-cellulose varnish yield blue-violet coatings on metal surfaces.

WVith nickel acetate instead of cobalt acetate there is obtained a brownish violet dyeing product and with manganese acetate an olive brown dyeing product.

Example 15 7 .32 parts of the dyestuff ofthe formula NH-CO-OH:

I No,

E trample 16' 15.6 parts of the sodium salt of the azodyestuif of the formula obtainable from imidazole acid of the formula soar-r as described in German specification No. 167,139, and diazotized 5-nitro-2-amino-1- phenol are dissolved in 500 parts of pyridine and 10.8 parts of chromium formate (corresponding with 4.5 parts of Cr O and the solution is boiled in a reflux apparatus until the chromium complex has been formed. The bulk of the solvent is then distilled and the dyestuff obtained from the remaining solution by introducing the latter into a solution of salt of 10' per cent. strength, to which dilute acetic acid has been added. After drying, there is obtained a violet powder of bronze lustre, which dissolves in water and caustic soda solution of 10 .per cent. strength to a blue'solution and in concentrated sulfuric acid to a violet solution, and dyes cotton and viscose uniform grey tints.

Example 17 6 parts of the sodium salt of the azo-dyestuff I r and the thiazole of the formula S O SOsH N NH-p orn 8H obtainable according to German specification No. 165,126 from 2-amino-5-hydroxyna hthalene-7-sulfonic acid, metanitrobenzal ehyde and alkalipolysulfides, which is advantageously acetylated, are dissolved in a mixture of 100 parts of pyridine and 100 parts of water, and after addition of 3.6 parts of chr0- mium formate corresponding with 1.5 parts 1 of Cr O the solution is boiled in a reflux apparatus. The initially red color quickly passes to blue. The solution is filtered from impurities, a part of the solvent is distilled and then the dyestufi is precipitated by adding the residual solution to a salt solution of 10 per cent. strength. The desired product is obtained by filtering and drying. It dissolves in hot Water and in caustic soda solution of 10 per cent. strength t. a blue solution and in concentrated s ifuric acic to a Violet solution. at dyes viscose and cotton uniform blue-grey tints of good properties 0: fastness.

Ewamplc J 8 5.3 parts of the sodium salt of the aZo-dyestuti' of the formula 0 H SO:II 1 i NH2 obtainable from diazotized chloroaminophenol-and imidazole acid of the formula given in Example 16 are dissolved in'lOO parts of pyridine and 100 parts of water, and after addition of an aqueous chromium fluoride solution corresponding with 1,5 parts of (Ii- C the solution ooiled in a reflux apparatus until chroming' is complete. The initially red solution becomes blue; it is liltered from impurities, a portion of the solvent is distilled and the residual solution is introducedinto a salt solution-of 10 per cent. strength, whereby the dyestuif is precipitated. It dissolves in water to a grey-blue solution, in dilute caustic soda solution and in concentrated sulfuric acid to a violet solution. It dyes viscose and cotton uniform violettints.

lVhat we claim is 1. A process for the manufacture of azodyestuffs containing metals, consisting in treating, in the presence of organic bases, aZo-dyestufl's, obtainable by coupling diazocompounds of the benzene series with nit-rogen-containing coupling components of the naphthalene series the nitrogen of which is not linked to oxygen and which azo-dycstutfs contain lake forming groups, with agents yielding metals capable of forming lakes with the lake-forming groups of the axe-dyestuffs.

2. A process for the manufacture of nonsulfonated azo-dyest-ulfs containing metals, consisting in treating, in the presence of organic bases, non-sulfonated azo-dyestufts obtainable by couplingnon-sulfonated diazocompoundsrof the benzene series with nonsulfonated nitrogen-containing coupling components of the naphthalene series the nitrogen of which is not linked to oxygen, and which non-sulfonated azo-dyestutls contain lake forming groups, with agents yielding metals capable of forming lakes with the lake-forming grouas of the non-sulfonated V ago-dyestuffs.

' axe-dyestuffs, obtainable by coupling 11011 esaesr sulfonated diam-compounds of the benzene series with non-sulfonated nitrogen-containing coupling'components of the naphthalene series the nitrogen of which is not linked to oxygen, and which non-sulfonated azo-dyestu'l's contain lake forming groups, with agents yielding metals capable of forming lakes witn the lake-forming groups of the nonsulfonated aZo-dyestuft's.

4. A process for the manufacture of nonsulfonated azo-dyestuffs containing metals, consisting in treating, in the presence of hetero-cyclic organic bases, the hcterocyclic atom of which is nitrogen, non-sulfonated axe-dyestuffs obtainable by coupling non-sulfonated diam-compounds of the benzene serie with non-sulfonated nitrogen-containing compel" ntscf the naphthalene trog n which is not linked to which non-sulfonated azo-dyei s' contain lai zf 'orining groups, with capable of forming lakes .Wle'li tne lane-rornizng groups or the non-sul'lonated azo-dyestuii's.

A process for the ,inanufacture of nonsulfoziated azo-dyestuiis containing metals, consisting in treating, in the presence of heterocyclic organic bases, the heterocyclic atom or which is nitrogen, non-sulfonated aao-dyestuii's obtainableby coupling nonsulfonated o, -hydroiq -c.iazo-benzenes with non-sulfonated nitrogen-containing coupling components of the naphthalene series the nitrogen of which is not linked to oxygen, with agents yielding netals capale of forming lakes with the lake-forming groups of the non-sulfonate'd aZo-dyestuffs.

6. A process for the manufacture of nonsulfonated azo-dyestulfs containing metals, consisting in treating, in the presence of heterocyclic organic bases, the heterocyclic atom of which is nitrogen, non-sulfonated zo-dyestulis obtainable by coupling nonsulfonated o-hydroxy-diazo-benzenes with non-sulfonated naphthylamine compounds the nitrogen of which is not linked to oxygen, with agents yielding metals capable of'forming lakes with the lake-forming groups of the non-snlfonated azo-dyestutls.

"7. A process for the manufacture ofnonsulfonated azo-dyestufi s containing metals, consisting in treating in the presence of pyridine, nonsulfonated azo-dyestufl's obtain able by coupling non-sulfonated o-hydroxycliazobenzenes with non-sulfonated naphthylamines, with agents yielding metals capable of forming lakes wi h the lake-forming groups of the non-sulfonated aZo-dyestuifs. e

8. A process for the manufacture of nonsulfonated rise-dyestuffs containing metals, consisting in treating, in the presence of pyridine, non-sulfonated azo-dyestuifs obtainable by coupling non-sulfonatcd o-hydroxydiazo-bsnzenes wiuu non-sulfonated naphthylamines, with agents yielding, metals of the atomic weight 27-66, capable of forming lakes with the lake forming groups of the non-sulfonated azo-dyestufi's.

9. A process for the manufacture of nonsulfonated aZo-dyestuffs containing metals, consisting in treating, in the presence of pyridine, non-sulfonated aZo-dyestutfs obtainable by coupling non-sulfonated o-hydroxydiazo-benzenes with non-sulfonated naphthylamines, with agents yielding metals of the atomic weight 52-66.

10. A process for tl e manufacture of nonsulfonated azo-dyestuffs containing metals, consisting in treating, in the presence of pyridine, non-sulfonated aZo-dyestufis obtainable by coupling non-sulfonated o-hydroxydiazo-benzenes with ,B-naphthylamine, with agents yielding metals of the atomic weight 52-56.

11. A process for the manufacture of nonsulfonated azo-dyestufis, containing metals, consisting in treating, in the presence of pyridine, non-sulfonated azo-dyestuifs obtainable by coupling diazotized 5-nitro-2-aminol-phenol and B-naphthylamine, with agents yielding metals of the atomic weight 52-56.

1 A process for the manufacture of a nonsulfonated' azo-dyestuff containing metal, consisting in treating, in the presence of pyridine, the aZo-dyestulf obtainable by coupling diazotized 5-11itro-2-amino-1-phenol and B-naphthylamine, with an agent yielding chromium.

13. As new products, the metal compounds of non-sulfonated azo-dyestufi's of the general formula R N=NR wherein It stands for non-sulfonated radicles of the benzene series and R for non-sulfonated nitrogencontaining naphthalene radicles the nitrogen of which is not linked to oxygen, and which dyestuffs contain complexly bound metals, which products form blue to green to black powders which are soluble in organic solvents with violet to blue to green coloration, in concentrated sulfuric acid to a red-violet to blue solution, and in theusual commercial pyroxyline varnishes to a violet to blue to green and olive-brown solution.

14. As new products, the metal compounds of nonsulfonated azo-dyestuffs of the general formula RN =N-R wherein R stands for a non-sulfonated radicle of the benzene series containing in ortho-position to the -N=N-bridge a hydroXyl-group, and wherein R stands for a non-sulfonated nitrogen-containing naphthalene radicle the nitrogen of which is not linked to oxygen, and which dyestuffs contain complexly bound metals, which products form blue to green to black powders which are soluble in organic solvents with violet to blue to green coloration, in concentrated sulfuric acid to a redviolet to blue solution, and in the usual commercial pyroxyline varnishes to a violet to blue to green and olive-brown solution.

15. As new products, the metal compounds of non-sulfonated azo-dyestulfs of the general formula in which R stands for a non-sulfonated naphthylamine, and which dyestuffs contain complexly bound metals of the atomic weight 27-66, which products form blue to green to black powders which are soluble in organic slovents with violet to blue to green colorati0n,'in concentrated sulfuric acid to a redviolet to blue solution, and in the usual com- 'mercial pyroxyline varnishes to a violet to blue to green and olive-brown solution.

1' 7. As new products, the metal compounds of non-sulfonated azo-dyestulis' of the general formula in which R stands for a non-sulfonated naphthylamine, and which dyestuffs contain compleXly bound metals of the atomic weight 52-66, which products form blue to green to black powders which are soluble in organic solvents with violet to blue to green coloration, in concentrated sulfuric acid to a redviolet to blue solution, and in the usual commercial pyronyline varnishes to a violet to blue to green and olive-brown solution.

18. As a new product, the metal compound of the non-sulfonated azo-dyestufi of the formula which dyestufi contains complexly bound chromiu1n, which product forms a greenishblack powder, which is soluble in alcohol 10 with green, in concentrated sulfuric acid With bluish-Violet and in the'usual commercial pyroxyline varnishes with yellow green color. En Witness whereof We have hereunto signed our names this 26th day of May 1930.

FRITZ STRAUB. HANS MAYER. WALTER I ANHART. 

